Gravity refueling limit for the 900 model?

• A. 14,810
• B. 14,580
• C. 15,000
• D. 14,700

Answer: (A)

Gravity refueling limit is the maximum amount of fuel that can be added to the aircraft by gravity flow alone, without using pumps. This limit comes from how the fuel system is built—the tank sizes and arrangement, the gravity head from the source, venting and relief protections, and the need to keep weight and balance within safe limits. For the 900 model, that gravity-feed ceiling is 14,810 pounds of fuel, reflecting the point at which gravity flow can safely fill the tanks without overfill, excessive line pressure, or destabilizing the aircraft’s center of gravity. The other numbers fall outside what the gravity method can reliably deliver or would push the aircraft beyond safe limits if relying on gravity alone.